Stromboidea

• Tylostomatidae Stoliczka, 1868

Genera of Tylostomatidae:

• Pterodonta d'Orbigny, 1843
• Tylostoma Sharpe, 1849

History and Synonymy

Tylostomatidae Stoliczka, 1868

• Tylostomidae Pchelintsev, 1951

2009

Kollmann, 2009, p. 58:

• "In his cladogram, Bandel (2007) indicates a connection between Harpagodes Gill and the Tylostomatidae Stoliczka, 1868. The Tylostomatidae comprise the genera Tylostoma Sharpe, 1849, and Pterodonta d´Orbigny, 1843. The shells are globular to oviform. In contrast to the Aporrhaidae, the Tylostomidae lack a rostrum. The aperture and the whorl portion opposite the aperture are constricted by varices or teeth. Internal moulds – which are the general mode of preservation – give the impression of a flaring labrum, which actually does not exist. The genus has been allocated to the Stromboidea because of the varicose aperture. At least currently, a connection with the Aporrhaidae cannot be proved."

References

• R.L. Squires and L.R. Saul. 2004. Uncommon Cretaceous naticiform gastropods from the Pacific Slope of North America. The Velliger 47(1-2):21-37